CN103904726A - System for common redundant bypass feed paths in uninterruptible power supplies - Google Patents
System for common redundant bypass feed paths in uninterruptible power supplies Download PDFInfo
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- CN103904726A CN103904726A CN201310741417.9A CN201310741417A CN103904726A CN 103904726 A CN103904726 A CN 103904726A CN 201310741417 A CN201310741417 A CN 201310741417A CN 103904726 A CN103904726 A CN 103904726A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/10—The network having a local or delimited stationary reach
- H02J2310/12—The local stationary network supplying a household or a building
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/14—District level solutions, i.e. local energy networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Inverter Devices (AREA)
Abstract
An uninterruptible power supply (UPS) system includes an inverter feed path and a plurality of bypass feed paths configured to couple to an AC voltage source such that each bypass feed path includes a switch configured to couple the AC voltage source to the load when closed. The switch in each bypass feed path may be rated to conduct current that corresponds to an output of the inverter feed path. Each bypass feed path may be coupled in parallel with each other and the inverter feed path. The UPS system may also include at least one controller coupled to a respective inverter and to a respective rectifier in the inverter feed path and a plurality of controllers. Each controller may be coupled to a respective switch such that the at least one controller and the plurality of controllers communicate with each other via at least two communication buses.
Description
Technical field
The disclosed theme of the embodiment of the present invention relates to for example, system for the high reliability bypass of multi-mode uninterruptible power supplies system (UPS) (, two conversion, ECO pattern etc.).
Background technology
Ups system is used to various application, to provide constant voltage source to load.Some ups systems comprise the inverter feed path being connected in parallel with bypass feed path.In normal manipulation mode, ups system can be fed to electric power to load by inverter feed path, and described inverter feed path is used rectifier to change into direct current (DC) electric power from the electric power of power supply.Subsequently, DC electric power is offered inverter by rectifier, and DC electric power is changed into controlled alternating electromotive force by this inverter.Ups system can be provided to load by this controlled AC electric power subsequently.In general, bypass feed path provides electric power by utility power to load.Therefore, bypass feed path provides the another way that load is provided electric power in the time that inverter feed path fault or isolation are keeped in repair for ups system.In some cases, multiple ups systems can be connected in parallel load to be provided to redundancy and/or additional power.Conventional implementation in parallel has dispersion bypass (, each ups system has its oneself bypass path) or center bypass (, the single independent bypass path in the time that each ups system only embeds rectifier-inverter path).Every kind of method has shortcoming.Disperseing the major defect of bypass is complexity, cost and area occupied, and center bypass provides limited reliability but shortage redundancy.Therefore, need to be used for improved system and the method for the bypass feed path of parallel UPS equipment.
Summary of the invention
In one embodiment, a kind of uninterruptible power system can comprise at least one inverter feed path, described at least one inverter feed path is configured and is connected on alternating-current voltage source so that described at least one inverter feed path can comprise: rectifier, and described rectifier configurations is for receiving AC voltage from described AC voltage source; And inverter, described inverter is configured for controlled AC Voltage-output to load.Described ups system also can comprise many bypass feed path, described many bypass feed path are configured and are connected on described AC voltage source so that every bypass feed path in described many bypass feed path comprises switch, and described switch is configured in the time of closure described AC voltage source is connected in described load.Switch in every bypass feed path goes for the conduction electric current corresponding with the output of described inverter feed path.Every bypass feed path can be connected in parallel with each other, so that many bypass feed path can be connected in parallel with at least one inverter feed path.Described ups system also can comprise at least one controller and the multiple controller on corresponding inverter and the corresponding rectifier being connected at least one inverter feed path.Each in described multiple controller can be connected in the respective switch in the corresponding bypass feed path in described many bypass feed path, so that described at least one controller and described multiple controller communicate with one another by least two communication buss.
In another embodiment, one method can comprise: monitor and conduct by multiple electric currents of multiple bypass feed path with processor, use static-switch module that AC voltage source is connected in load so that every bypass feed path can be configured for, described static-switch module is configured for AC voltage source is connected in load.Whether described method also can comprise at least one static-switch module fault of determining in described many bypass feed path, and sends signal to multiple controllers to use many inverter feed path to provide electric power to described load when described at least one static-switch module fault in described many bypass feed path.Every inverter feed path can be connected in parallel with each other and can comprise rectifier and inverter.Described multiple controller can comprise: the Part I of described controller, and wherein each is connected on the corresponding rectifier and corresponding inverter in described many inverter feed path; And the Part II of described controller, wherein each is connected in the corresponding static-switch module in described many bypass feed path.
In yet another embodiment, a kind of controller can be configured on the first rectifier and the first inverter being connected in the first inverter feed path, described the first inverter feed path is configured for and will changes into controlled AC voltage from the alternating voltage of AC voltage source, and described controlled AC voltage is configured and is connected in load.Described controller can also be configured for by many communication buss and communicate by letter with multiple other controllers so that each in described multiple other controllers be configured for be connected respectively to following upper: another rectifier and another inverter in another inverter feed path being connected in parallel with described the first inverter feed path; Be configured for the static-switch module offering from the described AC voltage of described AC voltage source in the bypass feed path of described load; Or its combination.Subsequently, described controller can be configured for and send signal to corresponding other controllers that are connected in described static-switch module, and wherein said signal configures for opening described static-switch module in the time that the quality of described AC voltage is not in Tolerance level.
Accompanying drawing explanation
While detailed description in detail below reading with reference to accompanying drawing, will understand better these and other feature of the present invention, aspect and advantage, in the accompanying drawings, similarity sign represents similar part, wherein:
Fig. 1 illustrates according to the block diagram of the uninterruptible power system of embodiment;
Fig. 2 illustrates according to the line chart of the redundancy bypass configuration of the ups system for Fig. 1 of embodiment; And
Fig. 3 illustrates according to the flow chart of the ups system for application drawing 1 of embodiment.
Embodiment
Below will be described one or more specific embodiments of the present invention.For the simple and clear description of these embodiment is provided, all features in actual implementation can not described in specification.Should understand, develop any this type of actual implementation in any engineering or design object time, must make the various decision-makings with implementation certain relevant, to realize developer's intended target, as observed, system is relevant retrains with traffic aided, and these constraints may be different different because of implementation.In addition, should understand, this type of development may be complicated and consuming time, but for benefiting from those skilled in the art of the present invention in affiliated field, this is by the normal work to do in being still design, manufacturing and producing.
The present invention relates in general to the redundancy bypass configuration for uninterruptible power system.On the whole, ups system of the present invention can comprise many inverter feed path that use rectifier, DC energy storage device (being generally battery) and inverter alternating voltage to be changed into controlled AC voltage.Ups system also can comprise many bypass feed path, and described many bypass feed path provide AC voltage by AC power supplies to load.In certain embodiments, ups system can be configured so that each inverter feed path can be connected in parallel with each other.Similarly, every bypass feed path in ups system can be connected in parallel with each other.Inverter feed path in parallel can be parallel-connected in the bypass feed path through being connected in parallel subsequently.Each in inverter feed path and bypass feed path in ups system can comprise controller.The controller being associated with many inverter feed path and many bypass feed path can be come and be communicated each other by redundancy communication bus.Therefore, the communication between the controller in ups system can have equity (peer-to-peer) structure, and a kind of redundant communication system is provided this peering structure so that the management inverter feed path of ups system and the operation of bypass feed path.Below with reference to Fig. 1 to 3, the other details of the redundancy bypass configuration about for ups system is described.
Referring now to accompanying drawing, Fig. 1 illustrates the block diagram of the ups system 10 that can comprise AC power 12, UPS14 and load 16.AC power supplies 12 can be utility power or certain other AC power supplies.AC power supplies 12 can provide AC voltage to UPS14, and described AC voltage can be for providing electric power to load 16.UPS14 can comprise many bypass feed path 18 and inverter feed path 20, and it can be used for the power delivery from AC power supplies 12 to load 16.Although bypass feed path 18 and inverter feed path 20 are depicted as in Fig. 1 be connected in AC power supplies 12, it should be noted that in other embodiments, can be different from the power supply for bypass feed path 18 for the power supply of inverter feed path 20.
In one embodiment, bypass path 18 and inverter path 20 can be connected on multiple controllers 22, and described multiple controllers 22 can be monitored the various electric aspect (for example, voltage and current) of UPS14.How controller 22 also controllable current can conduct and pass through UPS14.That is to say, controller 22 can make to pass through one or more bypass feed path 18 or one or more inverter feed path 20 from the electric current conduction of AC power supplies 12.
In view of foregoing, Fig. 2 describes the line chart for the redundancy bypass configuration 21 of ups system 10.As mentioned above, ups system 10 comprises many bypass feed path 18 (for example, bypass feed path 22 and 24) and many inverter feed path 20 (for example, inverter feed path 26 and 28).In one embodiment, bypass feed path 22 and bypass feed path 24 can link together so that they can parallel operation and every bypass feed path 22 or 24 can provide electric power to load 16 independently.Therefore, every bypass feed path 22 or 24 can comprise switch 30 and 32, as static-switch module.Each switch 30 or 32 goes for conduction for example to be come, for whole (, 100%) load 16 feeds from enough electric currents of AC power supplies 12.
In one embodiment, switch 30 and 32 can comprise SSM, and described SSM uses integrated gate commutated thyristor (IGCT) to connect and cut off.By at switch 30 and 32 interior use IGCT, UPS14 can provide more effective conversion using between bypass feed path 22 and 24 and inverter feed path 26 and 28.That is to say, because IGCT is forced commutation device, therefore switch 30 and 32 does not just in time turn-off when the zero crossing place of the AC electric current by switch 30 and 32 in conduction.On the contrary, switch (30 and 32) can turn-off by more controlled mode.Therefore, can be by inverter feed path 26 and 28 but not bypass feed path 22 or 24 provides electric power to load 16.
On the whole, IGCT is the highly efficient power switch with low on state voltage and low total-power loss (, approximately 50% of conventional gate electrode capable of switching off (GTO) thyristor).In addition, it can be without fuse (fuse-less) and non-cushioned (snubber-less) that IGCT makes switch 30 and 32, thereby its efficiency characteristic is further increased.Therefore,, by use IGCT in switch 30 and 32, UPS14 can reduce the total-power loss in ups system 14.Although switch 30 and 32 is described as using IGCT, it should be noted that in other embodiments, other types forced commutation device (for example, gate level turn-off thyristor) also can be used for switch 30 and 32.
Because every bypass feed path 22 and 24 can support whole load 16, therefore two bypass feed path 22 and 24 provide a kind of for providing the redundant fashion of electric power by AC power supplies 12 for load 16.That is to say, if a bypass feed path (for example, 22) become no longer can with or decommission, another bypass feed path (for example, 24) may can be whole load 16 feeds so.Except switch 30 and 32, bypass feed path 22 and 24 can comprise switch 34 and 36, and it can be for AC power supplies 12 and every bypass feed path 22 and 24 being provided and provide Additional Protection and/or control along bypass feed path 22 and 24.In addition, due to the abundant specified whole parallel system that is applicable to inverter feed path 26 and 28 of every bypass feed path 22 and 24, therefore two bypass feed path 22 and 24 can combine in some time (, parallel operation) to adapt to extreme system overload and similar state.For example, due to the abundant specified whole parallel system that is applicable to inverter feed path 26 and 28 of every bypass feed path 22 and 24, therefore two bypass feed path 22 and 24 can operate to adapt to the nearly continuous over loading situation of nominal load 16 approximately 200% simultaneously.
Go to now inverter feed path 26 and 28, every inverter feed path 26 or 28 can comprise rectifier 38,40, battery 42,44 and inverter 46,48.Therefore, rectifier 38,40 can receive AC voltage and convert it into DC voltage battery 42,44 is charged and supply DC electric power to inverter 46,48 from AC power supplies 12.Subsequently, inverter 46,48 can change into DC voltage controlled AC voltage.Then, controlled AC voltage can be offered to load 16.Every inverter feed path 26 and 28 can operate to be whole load 16 feeds simultaneously.In this way, inverter feed path 26 and 28 can be connected in parallel to realize reliability or capacity, makes UPS14 can be scaled to any rated value.
Similar to bypass feed path 22,24; inverter feed path 26 and 28 can comprise switch 50,52,54 and 56, and it can be for AC power supplies 12 and every inverter feed path 26 and 28 being provided and provide Additional Protection and/or control along inverter feed path 26 and 28.In addition, switch 50,52,54 and 56 can offer for convergent-divergent the output voltage (U of load 16
k).That is to say, every inverter feed path 26 and 28 can be by specific output voltage (U
k) offer load 16, and switch 50,52,54 and 56 can engage to make to offer the output voltage (U of load 16
k) meet some value.
In certain embodiments, UPS14 can for example, operate respectively by bypass feed path 22,24 and inverter feed path 26,28 under economic (, ECO) pattern and normal mode.That is to say, UPS14 can pass through engagement switch 30 or 32 (, closure) to be come with the operation of ECO pattern, thereby makes by-pass current to be transported to load 16 from power supply 12.Similarly, UPS14 can come with normal mode operation by engagement switch 50 and 54 or 52 and 56 (, closure), thereby makes inverter current to be transported to load 16 from power supply 12.
Each switch 30 and 32 referred to above can be connected on controller 58 and 60, and described controller 58 and 60 can be controlled from the electric power of AC power supplies 12 and can how to conduct by ups system 14 by bypass feed path 22 and 24.Similarly, each rectifier 38 and 40 and inverter 46 and 48 can be connected on controller 62 and 64, described controller 62 and 64 can be controlled from the electric power of AC power supplies 12 and can how be conducted and to be passed through UPS14 by inverter feed path 26 and 28.Although each controller 58,60,62,64 be described as being connected to rectifier 38 or 40 and inverter 46 or 48 on or be connected on switch 30 and 32, but in certain embodiments, each controller can be connected to corresponding rectifier 38 or 40 in inverter feed path and bypass feed path, inverter 46 or 48 and switch 30 or 32 on.
Each controller 58,60,62 or 64 can comprise communication component 66, processor 68, internal memory 70, memory 72, I/O (I/O) port 74 and homologue.Communication component 66 can be wireless or wire communication parts, and it can promote for example, communication between the various parts (, switch, rectifier, inverter) in UPS14.Processor 68 can be computer processor or the microprocessor of any type that can object computer executable code.Internal memory 70 and memory 72 can be can be as any appropriate article of the medium of storage of processor executable code.These goods can represent to store by processor 68 and are used for the computer-readable medium (, the internal memory of any appropriate format or memory) of the processor executable code of carrying out current disclosed technology.In one embodiment, each controller 58,60,62 can be from being suitable for expecting that any transducer of object receives the data relevant to the various characteristics of UPS14 with 64.For example, each controller 58,60,62 can receive the data relevant to the following with 64: conduction for example, by current signal (, the I ' of every bypass feed path 22 or 24
byp76, I "
byp78), offer current signal (for example, the I of load 16
k80), offer the voltage signal (U of load 16
k) 82, the voltage signal (U that exports of power supply 12
byp) 83 and homologue.
In view of foregoing, in the time switching between ECO operator scheme and normal manipulation mode, controller 58,60 can send signal to the IGCT in switch 30 and 32, so that switch 30 and 32 can turn-off immediately from its corresponding controller 58 or 60 receives cut-off signals.That is to say, by use IGCT in switch 30 and 32, controller 58 and 60 can force switch 30 and 32, but not operates when waiting for current waveform zero passage.Thus, relatively in switch 30 and 32, use other semiconductor devices, the change-over time while switching between ECO pattern and normal mode can be faster.
In one embodiment, at least one in controller 58,60,62 and 64 can be monitored the voltage (U that power supply 12 is exported
byp) 83 quality (for example, harmonic wave, noise, distortion).If voltage (U
byp) 83 quality are not in some Tolerance level, at least one in controller 58,60,62 and 64 can be by UPS14 from switching to normal mode and operate with the operation of ECO pattern so.That is to say, at least one in controller 58,60,62,64 first signal can be sent to the switch 30 or 32 of current closure so that it disconnects, and secondary signal is sent to the controller 62 and 64 being associated with inverter feed path 26 and 28 to electric current is transmitted to load 16 from power supply 12.Because controller 58,60 can use IGCT in switch 30 and 32 with more controlled and nearprompt mode stopcock 30 and 32, UPS14 can effectively switch more quickly between ECO pattern and normal mode thus.Therefore, controller 58,60 can guarantee load 16 not to be exposed to for a long time poor output voltage (U
k) 82 quality.In addition, relatively in switch 30 and 32, use the semiconductor device situation of other types, the total losses in the switch 30 and 32 of use IGCT can be less.
In certain embodiments, controller 58,60 can adopt periodical operation scheme to operate, to increase the efficiency of every bypass feed path 22 and 24.That is to say, in the time operating under ECO pattern, controller 58,60 can replace between every bypass feed path 22 and 24.Therefore, controller 58 and 60 can increase the component life of the each parts in every bypass feed path 22 and 24, reduce the stress on the each parts in be applied to every bypass feed path 22 and 24, reduce hours run number of the each parts in every bypass feed path 22 and 24 etc.
Except maximizing the efficiency that uses every bypass feed path 22 and 24, whether controller 58,60 can also monitor by- pass current 76,78 and sense switch 30,32 fault.Below with reference to Fig. 3 to about sense switch 30,32 whether the other details of fault be described.
Although Fig. 1 to 2 describes ups system 14 with line chart form, it should be noted that in certain embodiments, ups system 14 can have the multiple phase places as three-phase.For example, the output AC electric power (U of the load that offers 16
k) can comprise any quantity phase place (for example, u
1, u
2, u
3).Therefore, this specification reference to the curtage in each phase place to the reference intention conduct of the curtage in a phase.
Fig. 3 illustrates the flow chart for operating ups system 10.Specifically, the flow chart of Fig. 3 illustrates a kind of method 90 for determining when UPS14 should switch between operating with the operation of ECO pattern and normal mode.In certain embodiments, any controller executing method 90 in controller 58,60,62 and 64 or multiple controller.
At square frame 92 places, controller 58,60,62 and 64 can be monitored conduction by the electric current I of each bypass feed path 22 and 24 '
byp76, I "
byp78.Therefore, UPS14 can be by providing electric power to operate under ECO pattern via AC power supplies 12 to load 16.
At square frame 94 places, whether controller 58,60,62 and 64 can determine any switch 30 and 32 fault in bypass feed path 22 or 24.In one embodiment, if switch 30 or 32 is designated as " pass " or in open position, and controller 58,60,62 and 64 receives indicator current and is really conducting by the signal of its corresponding bypass feed path 22 or 24, controller 58,60,62 and 64 can determine that to inductive switch 30 or 32, because of potential short circuit fault, this can be towards bypass input end reverse feeding electric power so.In another embodiment, if two switches 30 and 32 in bypass feed path 22 and 24 are all designated as " opening " or in the close position, and controller 58,60,62 and 64 receives indication conduction by every bypass feed path 22 and 24 electric current different signal substantially, controller 58,60,62 and 64 can determine that in switch 30 or 32 one may fail disconnection so.In yet another embodiment, controller 58,60,62 and 64 can be controlled the amount of the electric current conducting by every bypass feed path, so that every bypass feed path load sharing (comprising overload) relatively equably.Therefore, controller 58,60,62 and 64 can be designed for amount relative equilibrium in whole opereating specification of guaranteeing the electric current conducting by every bypass feed path.
If the not fault of any switch of determining in bypass feed path 22 or 24 at square frame 94 place's controllers 58,60,62 and 64, controller 58,60,62 and 64 can return to square frame 92 and continue monitoring conduction by the electric current I of every bypass feed path 22 and 24 so '
byp76, I "
byp78.But if the fault of any switch that controller 58,60,62 and 64 is determined in bypass feed path 22 or 24, controller 58,60,62 and 64 can proceed to square frame 96 so.
At square frame 96 places, controller 58,60,62 and 64 can operate UPS14 with normal mode.That is to say, controller 58,60,62 and 64 can send signal to switch 30 and 32 so that its disconnection and send signal to rectifier 38 and 40 and inverter 46 and 48 to provide output voltage U to load 16
k.
Technique effect of the present invention comprises provides redundancy ups system, and described redundancy ups system provides improved reliability.In addition, use forced commutation device (for example, IGCT) because switch 30 and 32 can comprise, the conversion of therefore carrying out between the ECO operator scheme in UPS14 and normal manipulation mode can occur sooner, thus the conversion between operation improving pattern.In addition, technique effect of the present invention comprises provides larger protection to load 16, especially as carry out in the process of continuous bypass operation with ECO pattern.In addition, by operating ups system with periodicity pattern, UPS can have improved efficiency, makes the operation lifetime of its parts maximize simultaneously.
This specification use-case discloses the present invention, comprises optimal mode, also makes any technical staff in affiliated field can both put into practice the present invention, comprise any method of manufacturing and using any device or system and execution to contain simultaneously.Scope of patent protection of the present invention is defined by claims, and can comprise other examples that one of skill in the art find out.If the structural element that these type of other examples have is identical with the letter of claims, if or the letter of the equivalent structure element that comprises of these type of other examples and claims there is no difference substantially, these type of other examples are also in the scope of claims so.
Claims (19)
1. a uninterruptible power system, described ups system comprises:
Rectifier, described rectifier is configured and is connected on interchange (AC) voltage source;
Inverter, described inverter is configured and is connected on described rectifier and is configured for controlled AC Voltage-output to load;
Multiple switches, described multiple switch is configured to be connected on described AC voltage source and to be configured for and in the time of closure, conducts the current to described load, each switch in wherein said multiple switch is connected in parallel with each other, and wherein said multiple switch in parallel is connected on described rectifier and described inverter;
At least one controller, described at least one controller is configured and is connected on described rectifier and described inverter; And
Multiple controllers, the each controller in wherein said multiple controllers is configured in the respective switch being connected in described multiple switch, and wherein said at least one controller and described multiple controller communicate with one another by least two communication buss.
2. ups system as claimed in claim 1, the each switch in wherein said multiple switches is applicable to the conduction electric current corresponding with the output of described AC voltage source.
3. ups system as claimed in claim 1, the each switch in wherein said multiple switches is static-switch module (SSM).
4. ups system as claimed in claim 3, wherein each switch comprises multiple forced commutation devices.
5. ups system as claimed in claim 3, wherein each switch comprises multiple integrated gate commutated thyristors (IGCT).
6. ups system as claimed in claim 4, the each controller in wherein said multiple controllers is configured in described multiple forced commutation devices of controlling in each switch the operation of each.
7. ups system as claimed in claim 1, it comprises: isolating switch, described isolating switch is configured and is connected to the each switch in described multiple switch and is configured between the input terminal being connected on described AC voltage source.
8. ups system as claimed in claim 1, wherein said at least one controller is configured for first signal is sent to described rectifier and described inverter, wherein said first signal is configured for by described rectifier and described inverter electric current is transmitted to described load from described AC voltage source, and wherein said multiple controller is configured for secondary signal is sent to the each switch in described multiple switch, wherein said secondary signal is configured for the AC quality of voltage of exporting at described AC voltage source and disconnects each switch not in Tolerance level time.
9. ups system as claimed in claim 1, wherein said multiple switches are configured for from described AC voltage source and provide electric power to described load simultaneously.
10. ups system as claimed in claim 1, wherein said multiple switches are configured for from described AC voltage source and periodically provide electric power to described load.
11. 1 kinds of methods, described method comprises:
Conduction is monitored by multiple electric currents of multiple switches, and wherein each switch is configured for AC voltage source is connected in load;
Determine the whether fault of at least one switch in described multiple switch; And
When at least one switch fault in described multiple switches, send signal to multiple controllers to use at least one rectifier and at least one inverter provides electric power to described load, wherein said multiple controllers comprise:
The first set of described controller, wherein each is connected on described at least one rectifier and described at least one inverter; And
The second set of described controller, wherein each is connected in the respective switch in described multiple switch.
12. methods as claimed in claim 11, wherein determine described at least one switch in described multiple switches whether fault comprise and receive indication: in the time that described at least one switch disconnects, electric current is conducting by described at least one switch.
13. methods as claimed in claim 11, wherein determine described at least one switch in described multiple switches whether fault comprise and receive indication: when each switch in described multiple switches is closed, at least two fluids in described multiple electric currents are substantially different each other.
14. methods as claimed in claim 11, described method comprises:
Determine at least one electric current in described multiple electric current whether just at reverse feeding at least one switch in described multiple switches; And
When described at least one switch fault in described multiple switches, use described at least one rectifier and described at least one inverter to provide electric power to described load, wherein said at least one rectifier and described at least one inverter parallel are connected on described multiple switch.
15. methods as claimed in claim 11, wherein use described at least one rectifier and described at least one inverter to provide electric power to comprise the each switch cutting off in described multiple switches to described load, wherein each switch uses at least one forced commutation device to cut off.
16. 1 kinds of controllers, described controller is configured for:
Be connected on the first rectifier and the first inverter, wherein said the first rectifier is configured and is connected on AC voltage source, and wherein said the first inverter is configured for controlled AC Voltage-output to load;
Communicate by letter with multiple other controllers by many communication buss, each in wherein said multiple other controllers is configured for and is connected respectively to:
The second rectifier and the second inverter, wherein said the second rectifier is configured and is connected on described the second inverter, and wherein said the second rectifier and described the second inverter are configured and are parallel-connected on described the first rectifier and described the first inverter;
Switch, described switch is configured to be connected on described AC voltage source and to be configured for the AC voltage from described AC voltage source is offered to described load; Or
Its combination;
Send signal to corresponding other controllers that are connected on described switch, wherein said signal configures for disconnecting described switch in the time that described AC quality of voltage is not in Tolerance level.
17. controllers as claimed in claim 16, wherein said switch is applicable to the conduction electric current corresponding with the output of described the first rectifier and described the first inverter.
18. controllers as claimed in claim 16, wherein said controller is configured for and in the time that described AC quality of voltage is not in Tolerance level, sends signal to described the first rectifier and described the first inverter, to will be transmitted to described load from the electric current of described AC voltage source by described the first rectifier and described the first inverter.
19. controllers as claimed in claim 16, wherein said switch comprises multiple forced commutation devices, and corresponding other controllers in wherein said multiple other controllers are configured for the operation of described multiple forced commutation devices is controlled.
Applications Claiming Priority (3)
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| US13/727762 | 2012-12-27 | ||
| US13/727,762 US9831675B2 (en) | 2012-12-27 | 2012-12-27 | System for common redundant bypass feed paths in uninterruptible power supplies |
| US13/727,762 | 2012-12-27 |
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Also Published As
| Publication number | Publication date |
|---|---|
| US9831675B2 (en) | 2017-11-28 |
| CN103904726B (en) | 2018-01-19 |
| US20140183955A1 (en) | 2014-07-03 |
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